EP1029097B1 - Weldable anti-corrosive aluminium-magnesium alloy containing a high amount of magnesium, especially for use in aviation - Google Patents

Weldable anti-corrosive aluminium-magnesium alloy containing a high amount of magnesium, especially for use in aviation Download PDF

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Publication number
EP1029097B1
EP1029097B1 EP99952347A EP99952347A EP1029097B1 EP 1029097 B1 EP1029097 B1 EP 1029097B1 EP 99952347 A EP99952347 A EP 99952347A EP 99952347 A EP99952347 A EP 99952347A EP 1029097 B1 EP1029097 B1 EP 1029097B1
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EP
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Prior art keywords
weight
magnesium
scandium
almg
alloy
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP99952347A
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German (de)
French (fr)
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EP1029097A1 (en
Inventor
Blanka Lenczowski
Viktor Yelagin
Rainer Rauh
Valeri Zakharov
Yuri Filatov
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Airbus Operations GmbH
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Airbus Operations GmbH
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent

Definitions

  • the invention relates to a weldable, corrosion-resistant high magnesium-containing aluminum-magnesium alloy, which as an essential component of a ternary aluminum scandium zirconium phase contains.
  • a weldable, corrosion-resistant high magnesium-containing aluminum-magnesium alloy which as an essential component of a ternary aluminum scandium zirconium phase contains.
  • Such an alloy is for example from the US 5,624,632 and is known for its low density, high strength and corrosion resistance especially for applications in the aviation of interest.
  • elements of rare earth or rare earth elements are similar in the aluminum-magnesium alloy Dispersoids produced according to the o. G. US patent a higher strength and produce corrosion resistance. With regard to the weldability of such Alloy can the o. G. US patent no indication can be taken.
  • JP-A-52-11143 is an aluminum-magnesium alloy with low manganese content and at least one of lanthanides disclosed.
  • this new alloy has a significantly lower compared to the known alloy Manganese content, which surprisingly improved corrosion resistance, especially in the sensitized state the parts made of this alloy showed that is, for example, when cold-formed parts are exposed to an elevated temperature for a long time become. It is believed that these positive qualities are mainly due to the ratio from manganese to scandium. This shows an improved corrosion resistance at a ratio Mn: Sc ⁇ 2. Also, in contrast to the known alloy contained titanium contributes, in addition to the effect as a grain refining agent to increase strength because titanium can replace the zirconium in the ternary Al-Sc-Zr phase, with the However, solubility of titanium is lower than that of zirconium
  • a particularly favorable alloy for aircraft applications contains at least 0.15% by weight Scandium.
  • the addition of lanthanides advantageously moves in a weight percent range between 0.05 and 0.35, which range when using a lanthanide mixture refers to the total mixture.
  • the alloy tolerates impurities in silicon up to 0.1% by weight; above all, the dynamic properties deteriorate.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Powder Metallurgy (AREA)
  • Arc Welding In General (AREA)
  • Laminated Bodies (AREA)
  • Conductive Materials (AREA)
  • Prevention Of Electric Corrosion (AREA)

Description

Die Erfindung betrifft eine schweißbare, korrosionsbeständige hochmagnesiumhaltige Aluminium-Magnesium-Legierung, welche als wesentliche Komponente eine ternäre Aluminium-Scandium-Zirkonium-Phase enthält. Eine derartige Legierung ist beispielsweise aus der US 5,624,632 bekannt und ist aufgrund ihrer geringen Dichte, hohen Festigkeit und Korrosionsbeständigkeit vor allem für Anwendungen in der Luftfahrt von Interesse. Durch Zugabe von Elementen der seltenen Erden oder den seltenen Erden ähnlichen Elementen werden in der Aluminium-Magnesium-Legierung Dispersoide erzeugt, die gemäß dem o. g. US-Patent eine höhere Festigkeit und Korrosionsbeständigkeit erzeugen. Hinsichtlich der Schweißbarkeit einer derartigen Legierung kann dem o. g. US-Patent keine Angabe entnommen werden.The invention relates to a weldable, corrosion-resistant high magnesium-containing aluminum-magnesium alloy, which as an essential component of a ternary aluminum scandium zirconium phase contains. Such an alloy is for example from the US 5,624,632 and is known for its low density, high strength and corrosion resistance especially for applications in the aviation of interest. By adding elements of rare earth or rare earth elements are similar in the aluminum-magnesium alloy Dispersoids produced according to the o. G. US patent a higher strength and produce corrosion resistance. With regard to the weldability of such Alloy can the o. G. US patent no indication can be taken.

In JP-A-52-11143 ist eine Aluminium-Magnesium Legierung mit niedrigen Mangangehalt sowie zumindest einer von Lanthaniden offenbart.In JP-A-52-11143 is an aluminum-magnesium alloy with low manganese content and at least one of lanthanides disclosed.

Es ist Aufgabe der vorliegenden Erfindung eine schweißbare, korrosionsbeständige hochmagnesiumhaltige Aluminium-Magnesium-Legierung zu schaffen, welche hinsichtlich Festigkeit und Korrosionsverhalten der bekannten Legierung zumindest nicht nachsteht und zusätzlich zu einer guten Schweißbarkeit, eine hohe Rekristallisationsschwelle aufweist. Diese Aufgabe wird durch eine Aluminium-Magnesium-Legierung gemäß Patentanspruch 1 gelöst.It is an object of the present invention, a weldable, corrosion-resistant hochmagnesiumhaltige To create aluminum-magnesium alloy, which in terms of strength and Corrosion behavior of the known alloy at least not inferior and in addition to a good weldability, has a high recrystallization threshold. This task is done by an aluminum-magnesium alloy according to claim 1 dissolved.

Diese neue Legierung weist gegenüber der bekannten Legierung vor allem einen deutlich niedrigeren Mangananteil auf, wobei sich überraschenderweise eine verbesserte Korrosionsbeständigkeit, vor allem im sensibilisierten Zustand der aus dieser Legierung hergestellten Teile zeigte, also beispielsweise, wenn kaltverformte Teile über langere Zeit einer erhöhten Temperatur ausgesetzt werden. Es wird vermutet, daß diese positiven Eigenschaften vor allem durch das Verhältnis von Mangan zu Scandium bestimmt werden. So zeigt sich eine verbesserte Korrosionsbeständigkeit bei einem Verhältnis Mn : Sc < 2. Auch der im Unterschied zur bekannten Legierung enthaltene Titananteil trägt, zusätzlich zur Wirkung als Kornfeinungsmittel, zur Festigkeitserhöhung bei, da Titan das Zirkonium in der ternären Al-Sc-Zr-Phase ersetzen kann, wobei die Löslichkeit von Titan jedoch niedriger als von Zirkonium ist Above all, this new alloy has a significantly lower compared to the known alloy Manganese content, which surprisingly improved corrosion resistance, especially in the sensitized state the parts made of this alloy showed that is, for example, when cold-formed parts are exposed to an elevated temperature for a long time become. It is believed that these positive qualities are mainly due to the ratio from manganese to scandium. This shows an improved corrosion resistance at a ratio Mn: Sc <2. Also, in contrast to the known alloy contained titanium contributes, in addition to the effect as a grain refining agent to increase strength because titanium can replace the zirconium in the ternary Al-Sc-Zr phase, with the However, solubility of titanium is lower than that of zirconium

Die Zugabe von Cu und/oder Zn bewirken eine Steigerung der Festigkeit, die auf die bekanntermaßen hohe Festigkeit der Al-Cu-bzw. Al-Zn-Phase zurückgeht. Dabei sind die jeweiligen Konzentrationsobergrenzen so gewählt, daß das Cu vor allem nicht die Schweißbarkeit und das Zn nicht die Korrosionsbeständigkeit beeinträchtigt.The addition of Cu and / or Zn results in an increase in strength known to those skilled in the art high strength of Al-Cu or. Al-Zn phase goes back. Here are the respective upper concentration limits chosen so that the Cu above all not the weldability and the Zn does not affect the corrosion resistance.

Es hat sich weiterhin gezeigt, daß Scandium in gewissen Grenzen durch Terbium oder auch durch Cer ersetzt werden kann. Beim Ersatz durch Terbium ist jedoch zur Erzielung gleichbleibender Eigenschaften eine größere Zugabe als die des ersetzten Scandiums erforderlich.It has also been shown that scandium is within certain limits by terbium or can also be replaced by cerium. When replaced by terbium is to achieve consistent Properties require a greater addition than that of the replaced scandium.

Eine fur Luftfahrzeuganwendungen besondere günstige Legierung enthält zumindest 0,15 Gew.-% Scandium. Die Zugabe von Lanthaniden bewegt sich vorteilhafterweise in einem Gew.-%-Bereich zwischen 0,05 und 0,35, wobei sich dieser Bereich bei Verwendung eines Lanthanidengemisches auf das Gesamtgemisch bezieht. Die Legierung verträgt Verunreinigungen an Silizium bis zu 0,1 Gew.-%; darüber verschlechtern sich vornehmlich die dynamischen Eigenschaften.A particularly favorable alloy for aircraft applications contains at least 0.15% by weight Scandium. The addition of lanthanides advantageously moves in a weight percent range between 0.05 and 0.35, which range when using a lanthanide mixture refers to the total mixture. The alloy tolerates impurities in silicon up to 0.1% by weight; above all, the dynamic properties deteriorate.

Claims (5)

  1. Weldable, corrosion-resistant aluminium-magnesium alloy with a high magnesium content that contains a ternary aluminium-scandium-zirconium phase, consisting of 5-6% by weight magnesium (Mg), 0.05 - 0.15% by weight zirconium (Zr), 0.05-0.12% by weight manganese (Mn), 0.01 - 0.2% by weight titanium, 0.05 - 0.5% by weight of one or more elements of the group comprising scandium (Sc), terbium (Tb) and the lanthanides, in particular cerium (Ce), with at least scandium (Sc) being contained, 0.1 - 0.2% by weight copper (Cu) and/or 0.1 - 0.4% by weight zinc (Zn) and also as the remainder aluminium (Al) and unavoidable impurities with a maximum of 0.1% by weight silicon (Si).
  2. AlMg-alloy according to claim 1
    characterised in that the ratio of the proportions of manganese to scandium is lower than two.
  3. AlMg-alloy according to claim 1 or 2, characterised in that at least 0.15% by weight scandium (Sc) is contained.
  4. AlMg-alloy according to one of claims 1 to 3,
    characterised in that 0.05 - 0.35% by weight of one or more elements of the lanthanides, in particular
    cerium (Ce), neodymium (Nd), europium (Eu), gadolinium (Gd), dysprosium (Dy), holmium (Ho) or erbium (Er), is contained.
  5. Welded component for an aircraft, in particular for a fuselage, consisting of an AlMg alloy according to one of claims 1 to 4.
EP99952347A 1998-08-21 1999-08-10 Weldable anti-corrosive aluminium-magnesium alloy containing a high amount of magnesium, especially for use in aviation Expired - Lifetime EP1029097B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19838018A DE19838018C2 (en) 1998-08-21 1998-08-21 Welded component made of a weldable, corrosion-resistant, high-magnesium aluminum-magnesium alloy
DE19838018 1998-08-21
PCT/DE1999/002492 WO2000011232A1 (en) 1998-08-21 1999-08-10 Weldable anti-corrosive aluminium-magnesium alloy containing a high amount of magnesium, especially for use in aviation

Publications (2)

Publication Number Publication Date
EP1029097A1 EP1029097A1 (en) 2000-08-23
EP1029097B1 true EP1029097B1 (en) 2005-07-06

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EP99952347A Expired - Lifetime EP1029097B1 (en) 1998-08-21 1999-08-10 Weldable anti-corrosive aluminium-magnesium alloy containing a high amount of magnesium, especially for use in aviation

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Country Link
US (1) US6531004B1 (en)
EP (1) EP1029097B1 (en)
JP (1) JP2002523622A (en)
CN (1) CN1103827C (en)
CA (1) CA2306912C (en)
DE (2) DE19838018C2 (en)
ES (1) ES2242427T3 (en)
RU (1) RU2226565C2 (en)
WO (1) WO2000011232A1 (en)

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Also Published As

Publication number Publication date
CA2306912C (en) 2008-12-23
CN1274392A (en) 2000-11-22
RU2226565C2 (en) 2004-04-10
ES2242427T3 (en) 2005-11-01
DE19838018C2 (en) 2002-07-25
JP2002523622A (en) 2002-07-30
CN1103827C (en) 2003-03-26
DE19838018A1 (en) 2000-03-02
DE59912240D1 (en) 2005-08-11
EP1029097A1 (en) 2000-08-23
CA2306912A1 (en) 2000-03-02
WO2000011232A1 (en) 2000-03-02
US6531004B1 (en) 2003-03-11

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